Analyze compressor surge conditions by comparing operating point to estimated surge line and calculating surge margin.
Input Parameters
Results
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Surge Line Flow
lb/min
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Surge Margin
%
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Choke Flow
lb/min
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Operating Zone
Note: Compressor surge causes violent oscillations and can destroy bearings. Larger compressor trims have wider operating range but may be harder to spool.
Reference
Surge Slope = 0.35 + Trim x 0.003
Surge Line Flow = Slope x PR + 0.5
Choke Flow = Trim x 0.8 + 15
Effective Flow = Actual Flow x Throttle%
Surge Margin = (Flow - Surge Flow) / Flow x 100